For photographing the human voice and reproducing it, not as a picture but as the actual sound of the voice itself, a new device known as the Pallo-Photo-Phone has been perfected by Charles A. Hoxie of the General Electric Company. It is regarded...

A new understanding of how metals wear under friction and how to reduce this problem, may come from fundamental research being carried out at DuPont's Experimental Station, one of the largest centers of research in the world. It spreads over 95...